using System;

using ZXing;

//using System.Drawing;

//using System.Drawing.Imaging;

using SixLabors.ImageSharp;

using System.Runtime.InteropServices;

using System.Net.Http;

using System.IO;

​

var url = "https://upload.wikimedia.org/wikipedia/commons/thumb/d/d0/QR_code_for_mobile_English_Wikipedia.svg/1200px-QR_code_for_mobile_English_Wikipedia.svg.png";

var client = new HttpClient();

​

using HttpResponseMessage response = await client.GetAsync(url);

​

using HttpContent content = response.Content;

var stream = await content.ReadAsStreamAsync();

Console.WriteLine(stream.GetType());

using (var image = await SixLabors.ImageSharp.Image.LoadAsync<SixLabors.ImageSharp.PixelFormats.Rgba32>(stream))

{

    var reader = new ZXing.ImageSharp.BarcodeReader<SixLabors.ImageSharp.PixelFormats.Rgba32>();

    var result = reader.Decode(image);

    Console.WriteLine(result?.Text);

}

​

​

​